For pretty much as long as smartwatches have been a thing, the Apple Watch has been treated by many as the gold standard.

Incredibly smooth software experience; Great look and feel

You have to own an iPhone; No ECG in Australia

Alongside the iPhone XS , iPhone XS Max , and iPhone XR , Apple used the special event at the Steve Jobs Theatre in Cupertino earlier this week to unveil the Apple Watch Series 4 . The launch represents the biggest redesign to Apple's smartwatch since its introduction in 2015 .

Apple's smartwatch has finally hit its stride

Stunning looking display; Best smartwatch out there; watchOS 5 is great

Expensive; Lack of third-party Watch Faces; Unclear when ECG features will come to Canada

Sophisticated health sensors elevate the Apple Watch Series 4 from fun accessory to must-have device. This is the best smartwatch experience you can buy.

Big; beautiful display; Advanced health sensors; Faster processing power; Useful Raise to Speak Siri

ECG app not available at launch; Expensive

Apple Watch Series 4 has moved the smartwatch to an all-new level and it provides an excellent companion for anyone who wants to keep an eye on their health, their fitness and wants to stay connected with or without their iPhone by their side.

Great design; Larger screen; Cellular connection; Heart sensors; Fast and responsive

No third party watch faces; No roaming with cellular

If you already have an Apple Watch, should you upgrade That depends. If you own a Series 3, I wouldn't rush to trade it in unless you use it to make calls all the time or see the upcoming ECG feature as a must-have feature.

Large screen; Good call quality; ECG capability; Fall detection; WatchOS 5 brings numerous improvements; Stylish

Expensive; Battery life remains unchanged; No built-in sleep tracking

The fourth iteration of the Apple Watch still looks like a tiny iPhone on your wrist, but for many, it was the most exciting device announced at Apple's event earlier this month.

Bigger; better screen; All old Watch bands fit on the Series 4; Good battery life; Faster performance; Fall detection has the potential to be lifesaving; ECG features give users more control to monitor their health on a daily basis; Accurate auto workout detection and ending feature; WebKit support...

ECG app isn't available yet; WatchOS 5 drops support for Series 0 devices; New complications are only compatible with new watch faces; Still no support for third-party watch faces; Still no native sleep tracking; Siri has trouble completing Shortcuts; More expensive than any other Apple Watch; and...

The Apple Watch has been updated for the fourth time in as many years, bringing with it a number of new features , and for those looking to upgrade from the first-generation model , there's a tweaked design which features a bigger screen and other cool new tech .

Bigger and more immersive screen looks superb; Same strap size despite new design; Will last you through a day

Electrocardiogram feature not available at launch; Some WatchOS 5 nitpicks; No battery improvement

Apple takes unjustified heat for iterating on a product year after year. By not tossing out the whole platform and design, however, the company has created a game-changer with the Apple Watch Series 4.

Has there been a learning experience for Apple quite like the Apple Watch Back when the original model launched in 2015, there was – not unfairly – a sense that Apple itself wasn't quite sure what exactly it should do.

Mesmerizing new display; Fast and smooth performance; Health features could be game-changers; Battery life hasn't suffered

Siri still falls short; Expensive